Aspirin and Dipyridamole 25 mg; 200 mg Capsule, Extended Release, 60-count
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Platelet Aggregation Inhibitor class.
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🏭 Manufacturer & labeler
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🩺 Clinical
The combination of aspirin and extended-release dipyridamole is used to reduce the risk of stroke in patients who have had or are at risk of stroke. It is in a class of drugs called antiplatelet agents. It works by preventing excessive blood clotting.
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Supplement & herbal interactions
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💊 What it looks like
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.
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UNII 5C5403N26O
Acacia is a natural gum derived from acacia tree sap. It serves as a binder, thickener, and emulsifier to help hold ingredients together, improve texture, and stabilize the medicine.
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UNII 5138Q19F1X
Ammonia is a colorless gas made from nitrogen and hydrogen. It's used in medicines as a pH buffer to maintain the correct acidity level and help keep the product stable.
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Anhydrous lactose is a milk sugar with no water content. It acts as a filler and binder in tablets and capsules, adding bulk and helping ingredients stick together.
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UNII OP1R32D61U
Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
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UNII 92RU3N3Y1O
Dimethicone is a silicone-based oil that acts as an anti-foaming agent and lubricant in medicines. It reduces gas bubbles in liquid formulations and helps coat and protect the stomach lining when ingested.
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A synthetic yellow dye used to color medications. It helps identify the drug and make it visually distinctive, with no effect on how the medicine works.
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UNII EX438O2MRT
Ferric oxide yellow is a naturally occurring iron compound used as a colorant in medications. It gives tablets, capsules, and other forms a yellow or golden hue for identification and appearance.
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UNII XM0M87F357
A dark iron oxide compound that gives medicines their black or dark color. It's used as a colorant in tablets and capsules to help identify the product and make it visually distinctive.
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UNII 2G86QN327L
Gelatin is a protein derived from animal collagen, commonly used in medicines as a gelling agent and capsule material. It helps create soft or hard capsule shells that hold and release medication, and can also thicken liquid formulations.
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UNII 87Y6436BKR
Hypromellose phthalate is a plant-derived polymer that forms a protective coating around pills and capsules. It dissolves in the intestines rather than the stomach, helping deliver the medicine to the right place for absorption.
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Hypromellose is a plant-based thickener made from cellulose. It's used in medicines as a binder to hold ingredients together, a coating for tablets, and a thickener for liquids.
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UNII 1DI56QDM62
A natural fatty substance from soybeans that helps mix oil and water-based ingredients together. It acts as an emulsifier and lubricant in medicines to improve texture and help the product break down properly in your body.
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UNII 5KY68S2577
A synthetic plastic polymer made from two chemical compounds combined in a specific ratio. It forms a coating on tablets and capsules to control how and where the medication dissolves in the digestive tract.
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UNII 532B59J990
Polyvinyl alcohol is a synthetic polymer made from plant-derived materials. It's used as a binder to hold ingredients together, a film-former in coatings, and a thickener in liquid formulations.
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Potassium hydroxide is a strong alkaline chemical used in medicines to adjust and maintain the pH level of liquid formulations, helping keep the product stable and the active ingredients effective.
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Povidone is a synthetic polymer made from a plastic-like material. It acts as a binder to hold tablet ingredients together and as a disintegrant to help the tablet break apart in your stomach so the medicine can be absorbed.
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UNII 6DC9Q167V3
Propylene glycol is a clear liquid derived from petroleum or vegetable sources. It acts as a solvent, humectant, and preservative in medicines, helping dissolve active ingredients and maintain product stability.
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UNII 46N107B71O
Shellac is a natural resin secreted by the lac beetle. It's used as a coating on tablets and capsules to control how quickly the medicine dissolves and to improve appearance and stability.
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UNII ETJ7Z6XBU4
Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
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UNII 368GB5141J
A detergent and foaming agent derived from coconut or palm oil. In medications, it helps break down and mix oil and water-based ingredients, aids in tablet disintegration, and improves how the drug dissolves and spreads in the mouth or digestive system.
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UNII O8232NY3SJ
A plant-based carbohydrate derived from corn kernels. It acts as a filler to add bulk, a binder to hold ingredients together, and a disintegrant to help the tablet break apart in your stomach for absorption.
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UNII 4ELV7Z65AP
Stearic acid is a fatty acid derived from plant or animal sources. It acts as a binder and lubricant in tablets and capsules, helping them hold together and flow smoothly during manufacturing.
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UNII 7SEV7J4R1U
A powder made from a naturally occurring mineral. In medicines, talc works as a glidant and anti-caking agent, helping tablets and capsules flow smoothly during manufacturing and preventing clumping.
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UNII W4888I119H
Tartaric acid is a natural organic acid found in grapes and tamarinds. In medicines, it works as a buffer to control acidity, an antioxidant to prevent spoilage, and sometimes a flavoring or binding agent.
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UNII 15FIX9V2JP
Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.
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UNII XHX3C3X673
Triacetin is a clear, oily liquid made from glycerin and acetic acid. It works as a plasticizer and solvent in medicines, helping soften coatings and improve how liquids mix together in formulations.
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UNII TTV12P4NEE
Xanthan gum is a thickening and stabilizing ingredient made from fermented corn or other sugars. It's added to medicines to improve texture, prevent separation of liquids and solids, and help the product stay consistent.
27 inactive ingredients listed in the exact product block matched to this NDC.
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ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.559 | $33.55 / 60 capsules |
| Medicaid paysCMS SDUD · 12 mo | $0.9789 | $58.73 / 60 capsules |
| Medicare drug plans payPart D · Q2 2026 | $1.20 | $71.98 / 60 capsules |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Aspirin and Extended - Release Dipyridamole Capsules, 25 mg / 200 mg 25 mg/1; 200 mg 00904-7056-99 | Major | 20 capsules | $0.559 | AB | Availability likely | — |
| Aspirin and Dipyridamole 25 mg/1; 200 mgthis 16714-0964-01 | NorthStar | 60 capsules | $0.559 | AB | Availability likely | — |
| Aspirin And Extended-Release Dipyridamole 25 mg/1; 200 mg 42571-0274-60 | Micro | 60 capsules | $0.559 | AB | Availability likely | — |
| Aspirin and Dipyridamole 25 mg/1; 200 mg 43598-0339-60 | Dr. | 60 capsules | $0.559 | AB | Availability likely | — |
| Aspirin and Extended - Release Dipyridamole Capsules, 25 mg / 200 mg 25 mg/1; 200 mg 49884-0007-02 | Par | 60 capsules | $0.559 | AB | Availability likely | — |
| Aspirin and Extended-Release Dipyridamole 25 mg/1; 200 mg 65162-0596-06 | Amneal | 60 capsules | $0.559 | AB | Availability likely | — |
| Aspirin and Extended-Release Dipyridamole 25 mg/1; 200 mg 42291-0116-60 | AvKARE | 60 capsules | — | AB | FDA listed | — |
| Aspirin And Extended-Release Dipyridamole 25 mg/1; 200 mg 63629-5045-01 | Bryant | 90 capsules | — | AB | FDA listed | — |
| Asprin And Extended-Release Dipyridamole 25 mg/1; 200 mg 68462-0405-30 | Glenmark | 30 capsules | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
🗺️ Medicaid utilization & spend
🔬 Reported adverse events (FAERS)
Top reported reactions
Age at onset
Reporter sex
Serious outcomes
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📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 16714-0964-01 You're viewing this | 60 CAPSULE, EXTENDED RELEASE in 1 BOTTLE (16714-964-01) | 2019-04-03 | Active |
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
1 INDICATIONS AND USAGE Aspirin and extended-release dipyridamole capsules are indicated to reduce the risk of stroke in patients who have had transient ischemia of the brain or completed ischemic stroke due to thrombosis. Aspirin and extended-release dipyridamole capsules are a combination of aspirin and dipyridamole, antiplatelet agents, indicated to reduce the risk of stroke in patients who have had transient ischemia of the brain or completed ischemic stroke due to thrombosis ( 1 )
⏱️ Dosage and Administration ▾
2 DOSAGE AND ADMINISTRATION Aspirin and extended-release dipyridamole capsules are not interchangeable with the individual components of aspirin and dipyridamole tablets. The recommended dose of aspirin and extended-release dipyridamole capsules is one capsule given orally twice daily, one in the morning and one in the evening. Swallow capsules whole without chewing.
Aspirin and extended-release dipyridamole capsules can be administered with or without food. • One capsule twice daily (morning and evening) with or without food ( 2 ) • In case of intolerable headaches during initial treatment, switch to one capsule at bedtime and low-dose aspirin in the morning; resume BID dosing within one week (2.1 ) • Do not chew capsule ( 2 ) • Not interchangeable with the individual components of aspirin and dipyridamole tablets ( 2 ) • Dispense in this unit-of-use container ( 16 )
2.1Alternative Regimen in Case of Intolerable Headaches In the event of intolerable headaches during initial treatment, switch to one capsule at bedtime and low-dose aspirin in the morning. Because there are no outcome data with this regimen and headaches become less of a problem as treatment continues, patients should return to the usual regimen as soon as possible, usually within one week.
💊 Dosage Forms and Strengths ▾
3 DOSAGE FORMS AND STRENGTHS 25 mg aspirin and 200 mg extended-release dipyridamole capsule contains yellow to dark yellow colored extended-release pellets incorporating dipyridamole and white to off white round biconvex film coated tablet incorporating immediate-release aspirin, in size’0xEL’ hard gelatin capsule with orange colored cap and white to off white colored body, imprinted ‘339’ on the body and ‘RDY’ on cap with black ink. • Capsule: 25 mg aspirin and 200 mg extended-release dipyridamole ( 3 )
⛔ Contraindications ▾
4 CONTRAINDICATIONS • Hypersensitivity to any product ingredients ( 4.1 ) • Patients with known allergy to NSAIDs ( 4.2 ) • Patients with the syndrome of asthma, rhinitis, and nasal polyps ( 4.2 )
4.1Hypersensitivity Aspirin and extended-release dipyridamole capsules are contraindicated in patients with known hypersensitivity to any of the product components.
4.2Allergy Aspirin is contraindicated in patients with known allergy to nonsteroidal anti-inflammatory drug (NSAID)products and in patients with the syndrome of asthma, rhinitis, and nasal polyps. Aspirin may cause severe urticaria, angioedema or bronchospasm.
4.3Reye Syndrome Do not use aspirin in children or teenagers with viral infections because of the risk of Reye syndrome.
⚠️ Warnings and Cautions ▾
5 WARNINGS AND PRECAUTIONS • Aspirin and extended-release dipyridamole capsules increases the risk of bleeding ( 5.1 ) • Avoid use in patients with severe hepatic or renal insufficiency ( 5.2 , 5.3 ) • Interrupt aspirin and extended-release dipyridamole capsules 48 hours before using intravenous dipyridamole or other adenosinergic agents for stress testing ( 5.6 , 7.1 )
5.1Risk of Bleeding Aspirin and extended-release dipyridamole capsules increases the risk of bleeding. Risk factors for bleeding include the use of other drugs that increase the risk of bleeding (e.g., anticoagulants, antiplatelet agents, heparin, anagrelide, fibrinolytic therapy, and chronic use of NSAIDs) [see Drug Interactions ( 7.1 )]. Intracranial Hemorrhage In European Stroke Prevention Study-2 (ESPS2), the annualized event rate for intracranial hemorrhage was 0.39%/year in the aspirin and extended-release dipyridamole capsules group, 0.26%/year in the extended-release dipyridamole (ER-DP) group, 0.24%/year in the aspirin (ASA) group, and 0.29%/year in the placebo groups.
Gastrointestinal (GI) Side Effects GI side effects include stomach pain, heartburn, nausea, vomiting, and gross GI bleeding. Although minor upper GI symptoms, such as dyspepsia, are common and can occur anytime during therapy, physicians should remain alert for signs of ulceration and bleeding, even in the absence of previous GI symptoms. Inform patients about the signs and symptoms of GI side effects and what steps to take if they occur.
In ESPS2, the annualized event rate for gastrointestinal bleeding was 2.97%/year in the aspirin and extended-release dipyridamole capsules group, 1.58%/year in the extended-release dipyridamole group, 2.06%/year in the aspirin group, and 1.40%/year in the placebo groups. Peptic Ulcer Disease Avoid using aspirin in patients with a history of active peptic ulcer disease, which can cause gastric mucosal irritation and bleeding. Alcohol Warning Because aspirin and extended-release dipyridamole capsules contains aspirin, counsel patients who consume three or more alcoholic drinks every day about the bleeding risks involved with chronic, heavy alcohol use while taking aspirin.
5.2Renal Failure Avoid aspirin in patients with severe renal failure (glomerular filtration rate less than 10 mL/minute) [see Use in Specific Populations ( 8.6 ) and Clinical Pharmacology ( 12.3 ) ].
5.3Hepatic Insufficiency Elevations of hepatic enzymes and hepatic failure have been reported in association with dipyridamole administration [see Use in Specific Populations ( 8.6 ) and Clinical Pharmacology ( 12.3) ].
5.4Coronary Artery Disease Dipyridamole has a vasodilatory effect. Chest pain may be precipitated or aggravated in patients with underlying coronary artery disease who are receiving dipyridamole. For stroke or TIA patients for whom aspirin is indicated to prevent recurrent myocardial infarction (MI) or angina pectoris, the aspirin in this product may not provide adequate treatment for the cardiac indications.
5.5Hypotension Dipyridamole produces peripheral vasodilation, which can exacerbate pre-existing hypotension.
5.6Stress Testing with Intravenous Dipyridamole and Other Adenosinergic Agents Clinical experience suggests that patients being treated with aspirin and extended-release dipyridamole who also require pharmacological stress testing with intravenous dipyridamole or other adenosinergic agents (e.g. adenosine, regadenoson) should interrupt aspirin and extended-release dipyridamole capsules for 48 hours prior to stress testing [see Drug Interactions ( 7.1 )]. Intake of aspirin and extended-release dipyridamole capsules within 48 hours prior to stress testing with intravenous dipyridamole or other adenosinergic agents may increase the risk for cardiovascular side effects of these agents and may impair the sensitivity of the test.
5.7General Aspirin and extended-release dipyridamole capsules are not interchangeable with the individual components of aspirin and di…
🤒 Adverse Reactions ▾
6 ADVERSE REACTIONS The following adverse reactions are discussed elsewhere in the labeling: • Hypersensitivity [see Contraindications ( 4.1 )] • Allergy [see Contraindications ( 4.2 )] • Risk of Bleeding [see Warnings and Precautions ( 5.1 )] • The most frequently reported adverse reactions (>10% and greater than placebo) were headache, dyspepsia, abdominal pain, nausea, and diarrhea ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact NorthStar RxLLC at 1-800-206-7821 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The efficacy and safety of aspirin and extended-release dipyridamole capsules was established in the European Stroke Prevention Study-2 (ESPS2). ESPS2 was a double-blind, placebo-controlled study that evaluated 6,602 patients over the age of 18 years who had a previous ischemic stroke or transient ischemic attack within ninety days prior to entry.
Patients were randomized to either aspirin and extended-release dipyridamole capsules, aspirin, ER-DP, or placebo [see Clinical Studies (14)]; primary endpoints included stroke (fatal or nonfatal) and death from all causes. This 24-month, multicenter, double-blind, randomized study (ESPS2) was conducted to compare the efficacy and safety of aspirin and extended-release dipyridamole capsules with placebo, extended-release dipyridamole alone and aspirin alone. The study was conducted in a total of 6,602 male and female patients who had experienced a previous ischemic stroke or transient ischemia of the brain within three months prior to randomization.
Table 1 presents the annualized event rate for adverse events that occurred in 1%/year or more of patients treated with aspirin and extended-release dipyridamole capsules where the incidence was also at least 1%/year greater than in those patients treated with placebo. There is no clear benefit of the dipyridamole/aspirin combination over aspirin with respect to safety. Table 1 Incidence of Adverse Events in ESPS2 a Individual Treatment Group Body System/Preferred Term Aspirin and Extended-Release Dipyridamole Capsules n (%/year) b ER-DP Alone n(%/year) b ASA Alone n(%/year) b Placebo n(%/year) b Total Number of Patients 1650 1654 1649 1649 Central and Peripheral Nervous System Disorders Headache 647 (28.25) 634 (27.91) 558 (22.10) 543 (22.29) Gastrointestinal System Disorders Dyspepsia 303 (13.23) 288 (12.68) 299 (11.84) 275 (11.29) Abdominal Pain 289 (12.62) 255 (11.22) 262 (10.38) 239 (9.81) Nausea 264 (11.53) 254 (11.18) 210 (8.32) 232 (9.53) Diarrhea 210 (9.17) 257 (11.31) 112 (4.44) 161 (6.61) Vomiting 138 (6.03) 129 (5.68) 101 (4.00) 118 (4.84) Platelet, Bleeding and Clotting Disorders Hemorrhage NOS 52 (2.27) 24 (1.06) 46 (1.82) 24 (0.99) a Reported by ≥1%/year of patients during aspirin and extended-release dipyridamole capsules treatment where the incidence was at least 1%/year greater than in those treated with placebo. b Annual event rate per 100 pt-years = 100* number of subjects with event/subject-years.
Subject-years is defined as cumulative number of days on treatment divided by 365.25. Note: ER-DP = extended-release dipyridamole 200 mg; ASA = aspirin 25 mg. The dosage regimen for all treatment groups is BID NOS = not otherwise specified.
Discontinuation due to adverse events in ESPS2 was 25% for aspirin and extended-release dipyridamole capsules, 25% for extended-release dipyridamole, 19% for aspirin, and 21% for placebo (refer to Table 2). Table 2 Incidence of Adverse Events that Led to the Discontinuation of Treatment a Treatment Groups Aspirin and Extended-Release Dipyridamole Capsules n (%/year) b ER-DP (%/year) b ASA n (%/year) b Placebo n (%/year) b Total Number of Patients 1650 1654 1649 1649 Patients with at l…
🔄 Drug Interactions ▾
7 DRUG INTERACTIONS • Co-administration with anticoagulants, antiplatelets, or NSAIDs can increase risk of bleeding ( 7.1 ) • Decreased renal function can occur with co-administration with NSAIDs ( 7.1 )
7.1Drug Interaction Study Information Obtained From Literature Adenosinergic agents (e.g. adenosine, regadenoson) Dipyridamole has been reported to increase the plasma levels and cardiovascular effects of adenosine. Adjustment of adenosine dosage may be necessary. Dipyridamole also increases the cardiovascular effects of regadenoson, an adenosine A 2A -receptor agonist.
The potential risk of cardiovascular side effects with intravenous adenosinergic agents may be increased during the testing period when dipyridamole is not held 48 hours prior to stress testing. Angiotensin Converting Enzyme (ACE) Inhibitors Because of the indirect effect of aspirin on the renin-angiotensin conversion pathway, the hyponatremic and hypotensive effects of ACE inhibitors may be diminished by concomitant administration of aspirin. Acetazolamide Concurrent use of aspirin and acetazolamide can lead to high serum concentrations of acetazolamide (and toxicity) due to competition at the renal tubule for secretion.
Anticoagulants and Antiplatelets Patients taking aspirin and extended-release dipyridamole capsules in combination with anticoagulants, antiplatelets, or any substance impacting coagulation are at increased risk for bleeding. Aspirin can displace warfarin from protein binding sites, leading to prolongation of both the prothrombin time and the bleeding time. Aspirin can increase the anticoagulant activity of heparin, increasing bleeding risk.
Anagrelide Patients taking aspirin in combination with anagrelide are at an increased risk of bleeding. Anticonvulsants Salicylic acid can displace protein-bound phenytoin and valproic acid, leading to a decrease in the total concentration of phenytoin and an increase in serum valproic acid levels. Beta Blockers The hypotensive effects of beta blockers may be diminished by the concomitant administration of aspirin due to inhibition of renal prostaglandins, leading to decreased renal blood flow and salt and fluid retention.
Cholinesterase Inhibitors Dipyridamole may counteract the anticholinesterase effect of cholinesterase inhibitors, thereby potentially aggravating myasthenia gravis. Diuretics The effectiveness of diuretics in patients with underlying renal or cardiovascular disease may be diminished by the concomitant administration of aspirin due to inhibition of renal prostaglandins, leading to decreased renal blood flow and salt and fluid retention. Methotrexate Salicylate can inhibit renal clearance of methotrexate, leading to bone marrow toxicity, especially in the elderly or renal impaired.
Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) The concurrent use of aspirin with other NSAIDs may increase bleeding or lead to decreased renal function. Oral Hypoglycemics Moderate doses of aspirin may increase the effectiveness of oral hypoglycemic drugs, leading to hypoglycemia. Uricosuric Agents (probenecid and sulfinpyrazone) Salicylates antagonize the uricosuric action of uricosuric agents.
👥 Use in Specific Populations ▾
8 USE IN SPECIFIC POPULATIONS
8.1Pregnancy Risk Summary Available data from published studies and postmarketing experience with aspirin and extended-release dipyridamole capsules use during pregnancy have not identified a clear association between aspirin and extended-release dipyridamole capsules use and major birth defects, miscarriage, or adverse maternal or fetal outcomes (see Data). Aspirin and extended-release dipyridamole capsules contains low-dose aspirin which is an NSAID (see Clinical Considerations). In animal reproduction studies, there were adverse developmental effects with administration of aspirin in rats and rabbits at doses about 66 and 44 times, respectively, the human exposure at the maximum recommended daily dose of aspirin-dipyridamole.
Reproduction studies with dipyridamole in mice, rabbits, and rats have revealed no evidence of harm to the fetus up to doses about 25 times the maximum recommended daily human dose of aspirin-dipyridamole. Nonclinical data are suggestive of a possible potentiation of aspirin-related fetal toxicity when combined with dipyridamole (see Data) . The estimated background risk of major birth defects and miscarriage for the indicated population is unknown.
All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4 and 15 to 20%, respectively. Clinical Considerations Labor and Delivery Aspirin and extended-release dipyridamole capsules, which contains dipyridamole and low-dose aspirin, increases the risk for bleeding [see Warnings and Precautions ( 5.1) ] .
Maternal use of high-dose aspirin can result in excessive blood loss at delivery, prolonged gestation, prolonged labor, intracranial hemorrhage in premature infants, low birth weight, stillbirth, and neonatal death. Data Human Data Published data from clinical trials, observational studies, case series, and case reports over several decades have not identified a clear association between aspirin-dipyridamole use in pregnancy and major birth defects, miscarriage, or adverse maternal or fetal outcomes. However, these studies cannot definitively establish the absence of any aspirin-dipyridamole associated risks.
Methodological limitations of these studies include variability in the timing and dose of drug exposure (e.g., most exposures occurred beyond the first trimester) and the small sample sizes of individual studies. Animal Data Aspirin has been shown to be teratogenic in rats (spina bifida, exencephaly, microphthalmia and coelosomia) and rabbits (congested fetuses, agenesis of skull and upper jaw, generalized edema with malformation of the head, and diaphanous skin) at oral doses of 330 mg/kg/day and 110 mg/kg/day, respectively.
These doses, which also resulted in a high resorption rate in rats (63% of implantations versus 5% in controls), are, on a mg/m 2 basis, about 66 and 44 times, respectively, the dose of aspirin contained in the maximum recommended daily human dose of aspirin-dipyridamole. Reproduction studies with dipyridamole have been performed in mice, rabbits and rats at oral doses of up to 125 mg/kg, 40 mg/kg, and 1,000 mg/kg, respectively (about 1½, 2, and 25 times the maximum recommended daily human oral dose, respectively, on a mg/m 2 basis) and have revealed no evidence of harm to the fetus due to dipyridamole.
When 330 mg aspirin/kg/day was combined with 75 mg dipyridamole/kg/day in the rat at doses about 66 and 2 times, respectively, the maximum recommended daily human dose, the resorption rate approached 100%.
8.2Lactation Risk Summary Based on data from a clinical lactation study in breastfeeding women taking low-dose aspirin, the metabolite salicylic acid is present in human milk in low levels (see Data). Dipyridamole is also present in human milk. There is no information on the effects of aspirin and extended-release dipyridam…
🤰 Pregnancy ▾
8.1Pregnancy Risk Summary Available data from published studies and postmarketing experience with aspirin and extended-release dipyridamole capsules use during pregnancy have not identified a clear association between aspirin and extended-release dipyridamole capsules use and major birth defects, miscarriage, or adverse maternal or fetal outcomes (see Data). Aspirin and extended-release dipyridamole capsules contains low-dose aspirin which is an NSAID (see Clinical Considerations). In animal reproduction studies, there were adverse developmental effects with administration of aspirin in rats and rabbits at doses about 66 and 44 times, respectively, the human exposure at the maximum recommended daily dose of aspirin-dipyridamole.
Reproduction studies with dipyridamole in mice, rabbits, and rats have revealed no evidence of harm to the fetus up to doses about 25 times the maximum recommended daily human dose of aspirin-dipyridamole. Nonclinical data are suggestive of a possible potentiation of aspirin-related fetal toxicity when combined with dipyridamole (see Data) . The estimated background risk of major birth defects and miscarriage for the indicated population is unknown.
All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4 and 15 to 20%, respectively. Clinical Considerations Labor and Delivery Aspirin and extended-release dipyridamole capsules, which contains dipyridamole and low-dose aspirin, increases the risk for bleeding [see Warnings and Precautions ( 5.1) ] .
Maternal use of high-dose aspirin can result in excessive blood loss at delivery, prolonged gestation, prolonged labor, intracranial hemorrhage in premature infants, low birth weight, stillbirth, and neonatal death. Data Human Data Published data from clinical trials, observational studies, case series, and case reports over several decades have not identified a clear association between aspirin-dipyridamole use in pregnancy and major birth defects, miscarriage, or adverse maternal or fetal outcomes. However, these studies cannot definitively establish the absence of any aspirin-dipyridamole associated risks.
Methodological limitations of these studies include variability in the timing and dose of drug exposure (e.g., most exposures occurred beyond the first trimester) and the small sample sizes of individual studies. Animal Data Aspirin has been shown to be teratogenic in rats (spina bifida, exencephaly, microphthalmia and coelosomia) and rabbits (congested fetuses, agenesis of skull and upper jaw, generalized edema with malformation of the head, and diaphanous skin) at oral doses of 330 mg/kg/day and 110 mg/kg/day, respectively.
These doses, which also resulted in a high resorption rate in rats (63% of implantations versus 5% in controls), are, on a mg/m 2 basis, about 66 and 44 times, respectively, the dose of aspirin contained in the maximum recommended daily human dose of aspirin-dipyridamole. Reproduction studies with dipyridamole have been performed in mice, rabbits and rats at oral doses of up to 125 mg/kg, 40 mg/kg, and 1,000 mg/kg, respectively (about 1½, 2, and 25 times the maximum recommended daily human oral dose, respectively, on a mg/m 2 basis) and have revealed no evidence of harm to the fetus due to dipyridamole.
When 330 mg aspirin/kg/day was combined with 75 mg dipyridamole/kg/day in the rat at doses about 66 and 2 times, respectively, the maximum recommended daily human dose, the resorption rate approached 100%.
🧒 Pediatric Use ▾
8.4Pediatric Use Safety and effectiveness of aspirin and extended-release dipyridamole capsules in pediatric patients have not been studied. Because of the aspirin component, use of this product in the pediatric population is not recommended [see Contraindications ( 4.3 ) ] .
🧓 Geriatric Use ▾
8.5Geriatric Use Of the total number of subjects in ESPS2, 61% were 65 and over, while 27% were 75 and over. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out [see Clinical Pharmacology ( 12.3 ) ] .
🆘 Overdosage ▾
10 OVERDOSAGE Because of the dose ratio of dipyridamole to aspirin, overdosage of aspirin and extended-release dipyridamole capsules are likely to be dominated by signs and symptoms of dipyridamole overdose. In case of real or suspected overdose, seek medical attention or contact a Poison Control Center immediately. Careful medical management is essential.
Based upon the known hemodynamic effects of dipyridamole, symptoms such as warm feeling, flushes, sweating, restlessness, feeling of weakness, and dizziness may occur. A drop in blood pressure and tachycardia might also be observed. Salicylate toxicity may result from acute ingestion (overdose) or chronic intoxication.
Severity of aspirin intoxication is determined by measuring the blood salicylate level. The early signs of salicylic overdose (salicylism), including tinnitus (ringing in the ears), occur at plasma concentrations approaching 200 mg/mL. In severe cases, hyperthermia and hypovolemia are the major immediate threats to life.
Plasma concentrations of aspirin above 300 mg/mL are clearly toxic. Severe toxic effects are associated with levels above 400 mg/mL. A single lethal dose of aspirin in adults is not known with certainty but death may be expected at 30 grams.
Treatment of overdose consists primarily of supporting vital functions, increasing drug elimination, and correcting acid-base disturbances. Consider gastric emptying and/or lavage as soon as possible after ingestion, even if the patient has vomited spontaneously. After lavage and/or emesis, administration of activated charcoal as a slurry may be beneficial if less than 3 hours have passed since ingestion.
Charcoal absorption should not be employed prior to emesis and lavage. Follow acid-base status closely with serial blood gas and serum pH measurements. Maintain fluid and electrolyte balance.
Administer replacement fluid intravenously and augment with correction of acidosis. Treatment may require the use of a vasopressor. Infusion of glucose may be required to control hypoglycemia.
Administration of xanthine derivatives (e.g., aminophylline) may reverse the vasodilatory effects of dipyridamole overdose. Plasma electrolytes and pH should be monitored serially to promote alkaline diuresis of salicylate if renal function is normal. In patients with renal insufficiency or in cases of life-threatening intoxication, dialysis is usually required to treat salicylic overdose; however, since dipyridamole is highly protein bound, dialysis is not likely to remove dipyridamole.
Exchange transfusion may be indicated in infants and young children.
🧬 Clinical Pharmacology ▾
12 CLINICAL PHARMACOLOGY
12.1Mechanism of Action The antithrombotic action of aspirin and extended-release dipyridamole capsules is the result of the additive antiplatelet effects of dipyridamole and aspirin. Dipyridamole Dipyridamole inhibits the uptake of adenosine into platelets, endothelial cells and erythrocytes in vitro and in vivo ; the inhibition occurs in a dose-dependent manner at therapeutic concentrations (0.5 to 1.9 mcg/mL). This inhibition results in an increase in local concentrations of adenosine which acts on the platelet A 2 -receptor thereby stimulating platelet adenylate cyclase and increasing platelet cyclic-3',5'-adenosine monophosphate (cAMP) levels.
Via this mechanism, platelet aggregation is inhibited in response to various stimuli such as platelet activating factor (PAF), collagen and adenosine diphosphate (ADP). Dipyridamole inhibits phosphodiesterase (PDE) in various tissues. While the inhibition of cAMP-PDE is weak, therapeutic levels of dipyridamole inhibit cyclic-3',5'guanosine monophosphate-PDE (cGMP-PDE), thereby augmenting the increase in cGMP produced by EDRF (endothelium-derived relaxing factor, now identified as nitric oxide).
Aspirin Aspirin inhibits platelet aggregation by irreversible inhibition of platelet cyclooxygenase and thus inhibits the generation of thromboxane A 2 , a powerful inducer of platelet aggregation and vasoconstriction.
12.2Pharmacodynamics The effect of either agent on the other's inhibition of platelet reactivity has not been evaluated.
12.3Pharmacokinetics There are no significant interactions between aspirin and dipyridamole. The kinetics of the components are unchanged by their co-administration as aspirin and extended-release dipyridamole capsules. Absorption Dipyridamole Peak plasma levels of dipyridamole are achieved 2 hours (range 1 to 6 hours) after administration of a daily dose of 400 mg aspirin and extended-release dipyridamole capsules (given as 200 mg BID).
The peak plasma concentration at steady-state is 1.98 mcg/mL (1.01 to 3.99 mcg/mL) and the steady-state trough concentration is 0.53 mcg/mL (0.18 to 1.01 mcg/mL). Aspirin Peak plasma levels of aspirin are achieved 0.63 hours (0.5 to 1 hour) after administration of a 50 mg aspirin daily dose from aspirin and extended-release dipyridamole capsules (given as 25 mg BID). The peak plasma concentration at steady-state is 319 ng/mL (175 to 463 ng/mL).
Aspirin undergoes moderate hydrolysis to salicylic acid in the liver and the gastrointestinal wall, with 50% to 75% of an administered dose reaching the systemic circulation as intact aspirin. Effect of Food Dipyridamole When aspirin and dipyridamole extended-release capsules were taken with a high fat meal, dipyridamole peak plasma levels (C max ) and total absorption (AUC) were decreased at steady-state by 20 to 30% compared to fasting. Due to the similar degree of inhibition of adenosine uptake at these plasma concentrations, this food effect is not considered clinically relevant.
Aspirin When aspirin and extended-release dipyridamole capsules were taken with a high fat meal, there was no difference for aspirin in AUC at steady-state, and the approximately 50% decrease in C max was not considered clinically relevant based on a similar degree of cyclooxygenase inhibition comparing the fed and fasted state. Distribution Dipyridamole Dipyridamole is highly lipophilic (log P=3.71, pH=7); however, it has been shown that the drug does not cross the blood-brain barrier to any significant extent in animals.
The steady-state volume of distribution of dipyridamole is about 92 L. Approximately 99% of dipyridamole is bound to plasma proteins, predominantly to alpha 1-acid glycoprotein and albumin. Aspirin Aspirin is poorly bound to plasma proteins and its apparent volume of distribution is low (10 L).
Its metabolite, salicylic acid, is highly bound to plasma proteins, but its binding is concentration-dependent (nonlinear). At low concentrations (<100 mcg/mL), approxi…
🧬 Mechanism of Action ▾
12.1Mechanism of Action The antithrombotic action of aspirin and extended-release dipyridamole capsules is the result of the additive antiplatelet effects of dipyridamole and aspirin. Dipyridamole Dipyridamole inhibits the uptake of adenosine into platelets, endothelial cells and erythrocytes in vitro and in vivo ; the inhibition occurs in a dose-dependent manner at therapeutic concentrations (0.5 to 1.9 mcg/mL). This inhibition results in an increase in local concentrations of adenosine which acts on the platelet A 2 -receptor thereby stimulating platelet adenylate cyclase and increasing platelet cyclic-3',5'-adenosine monophosphate (cAMP) levels.
Via this mechanism, platelet aggregation is inhibited in response to various stimuli such as platelet activating factor (PAF), collagen and adenosine diphosphate (ADP). Dipyridamole inhibits phosphodiesterase (PDE) in various tissues. While the inhibition of cAMP-PDE is weak, therapeutic levels of dipyridamole inhibit cyclic-3',5'guanosine monophosphate-PDE (cGMP-PDE), thereby augmenting the increase in cGMP produced by EDRF (endothelium-derived relaxing factor, now identified as nitric oxide).
Aspirin Aspirin inhibits platelet aggregation by irreversible inhibition of platelet cyclooxygenase and thus inhibits the generation of thromboxane A 2 , a powerful inducer of platelet aggregation and vasoconstriction.
📦 How Supplied / Storage and Handling ▾
16 HOW SUPPLIED/STORAGE AND HANDLING Aspirin and extended-release dipyridamole capsules are available as a hard gelatin capsule, with orange colored cap and white to off white colored body, containing yellow to dark yellow colored extended-release pellets incorporating dipyridamole and white to off white round biconvex film coated tablet incorporating immediate-release aspirin. The capsule body is imprinted with ‘339’ on the body and ‘RDY’ on cap with black ink. Aspirin and extended-release dipyridamole capsules are supplied in unit-of-use bottles of 60s capsules.
Bottles of 60’s NDC 16714-964-01 Store at 20ºC to 25ºC (68ºF to 77ºF); [See USP Controlled Room Temperature]. Protect from excessive moisture.
📋 Description ▾
11 DESCRIPTION Aspirin and extended-release dipyridamole capsules are a combination of aspirin and dipyridamole, antiplatelet agents, intended for oral administration. Each hard gelatin capsule contains 200 mg dipyridamole in an extended-release form and 25 mg aspirin, as an immediate-release film-coated tablet. In addition, each capsule contains the following inactive ingredients: acacia, anhydrous lactose, colloidal silicon dioxide, dimethicone, hypromellose, hypromellose phthalate, lecithin, methacrylic acid copolymer, microcrystalline cellulose, polyvinyl alcohol, povidone, pregelatinized starch, stearic acid, talc, tartaric acid, titanium dioxide, triacetin and xanthan gum.
Each capsule shell contains FD&C yellow 6, gelatin, sodium lauryl sulfate, titanium dioxide and yellow iron oxide. Imprinting ink contains black iron oxide, potassium hydroxide, propylene glycol, shellac and strong ammonia solution. Dipyridamole Dipyridamole is an antiplatelet agent chemically described as 2,2',2'',2'''-[(4,8-Dipiperidinopyrimido[5,4-d]pyrimidine-2,6-diyl)dinitrilo]-tetraethanol.
It has the following structural formula: Dipyridamole USP is an intensely yellow, crystalline powder or needles. It is practically insoluble in water, sparingly soluble in ethyl alcohol, very slightly soluble in acetone and ethyl acetate. Aspirin The antiplatelet agent aspirin (acetylsalicylic acid) is chemically known as benzoic acid, 2- (acetyloxy)-, and has the following structural formula: Aspirin USP is a white crystals, commonly tabular or needle like, or white, crystalline powder.
Slightly soluble in water, freely soluble in alcohol, soluble in chloroform and in ether, sparingly soluble in absolute ether.
💬 Information for Patients ▾
17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information). • Risk of Bleeding Inform patients that as with other antiplatelet agents, there is a general risk of bleeding including intracranial and gastrointestinal bleeding. Inform patients about the signs and symptoms of bleeding, including occult bleeding. Tell patients to notify their physician if they are prescribed any drug which may increase risk of bleeding.
Counsel patients who consume three or more alcoholic drinks daily about the bleeding risks involved with chronic, heavy alcohol use while taking aspirin. • Pregnancy Advise patients to notify their healthcare provider if they become pregnant or intend to become pregnant during treatment with aspirin and extended-release dipyridamole capsules [see Use in Specific Populations ( 8.1 ) ] . • Headaches Some patients may experience headaches upon treatment initiation; these are usually transient. In case of intolerable headaches, tell patients to contact their physician. • Stress Test Instruct patients who are scheduled to undergo a pharmacologic stress test to tell their healthcare provider that they are taking aspirin and extended-release dipyridamole capsules. • Dosage and Administration Tell patients that aspirin and extended-release dipyridamole capsules should be swallowed whole, and not chewed or crushed.
If you miss a dose, continue with your next dose on your regular schedule. Do not take a double dose. • Storage Inform patients to protect aspirin and extended-release dipyridamole capsules from moisture. Rx only Manufactured for: Northstar Rx LLC Memphis, TN 38141 Manufactured by Dr.
Reddy’s Laboratories Limited Bachupally – 500 090 INDIA Revised: 0521